package com.api.gateway;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.reactive.CorsWebFilter;
import org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource;
import org.springframework.web.util.pattern.PathPatternParser;

/**
 * @author Howl-Xu
 * @version 1.0.0
 * @Description: 请描述一下这个类文件吧
 * @createTime 2020年03月13日 21:41:00
 */

@SpringBootApplication
@EnableDiscoveryClient
@ComponentScan("com.api.gateway.*")
public class GatewayApplication {

    public static void main(String[] args) {
        SpringApplication.run(GatewayApplication.class,args);
    }

    /**
     * 解决跨域问题，不知道为什么用yml配置不生效，只能用这种方式了
     * @return
     */
    @Bean
    public CorsWebFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        // cookie跨域
        config.setAllowCredentials(Boolean.TRUE);
        config.addAllowedMethod("*");
        config.addAllowedOrigin("*");
        config.addAllowedHeader("*");
        // 配置前端js允许访问的自定义响应头
        config.addExposedHeader("setToken");

        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
        source.registerCorsConfiguration("/**", config);

        return new CorsWebFilter(source);
    }
}
